Control system for heaters



Dec. 18, 1934. w. J. MASONER 1,985,047

CONTROL SYSTEM FOR HEATERS Filed May 3, 1934 2 Sheets-Sheet 1 Hllll 3 34 g I l Q 2 B A Q l g s Dec. 18, 1934. w. J. MASONER CONTROL SYSTEM FOR HEATERS Filed May 5, 1934 2 Sheets-Sheet 2 .LINE

Patented Dee. v 13; 19

UNITED STATES PATENT onus oon'raon'srsrau son nas'raas William J. Masoner, Oak Park, n1. Application my a, 1934, Serial No. 723,695 1 mm. ((11. 126110) Heating of shops, stores, ofllces, and the like, is now often accomplished by means of gas fired heater units which are individually controlled by thermostats and by individual switches.

Each unit has an electric fan which circulates air during summer months.

' the gas is shut off from the heater unit. It is desirable to use these same fans for circulating An' object of this invention is to provide a means for readily driving the fan independently of the heater unit, aim to control this means by the valve which shuts oil the flow of gas to the heaters.

Another object is to provide a combination interconnected gas shut-oi! valve and electric switch for the above purpose.

Another object is to provide in a gas furnace or heater, a combination of shut-oi! valve and control valve, the latter being controlled by the former as well as by the gas pilot so that the control valve will not open if the furnace pilot light is out. I

These and other objects, as will hereinafter appear, are accomplished by this invention which is fully described in the following specification andshown in the accompanylns drawings, in which- Figure 1. ma side elevation partly in section of agas heater unit showing the gas cock switch applied thereto; Fig. 2 is an enlarged horizontal section on the line 2 of Fig. 1 showing the combination of the gas cock and electric switch operable by the rotatable plug of the cock;

Fig. 3 is a transverse section through the gas cock and switch on the line 3 of Fig. 2;

Fig. 4 is a vertical sectionon the line} of g. 3;. Fig.5isawirlngdiagramoftheheaterunit and the gas cock switch.

The embodiment shown in Figs. 1 to linclusive comprises a gas heater unit A with a gas cock switch B applied thereto, as will later be described in detail. The'gas heater unit A in itself forms no part of the present. invention, and comprises a series of vertical tubes which are heated by any suitable combustible gas supplied to a burner 11 through pipes 12, 13 from a suitable source ofgss supply, not shown. The

hot gases from the burner 11 passup through the tubes 10 and out through a suitable pipe. toa stack, not-shown.

An electric motor 15 drives a fan 16 which serves to pass air of the room to be heated over the hot tubes liL thereby electing a transfer of heat. The air issuing from the heater unit is directed by means of vanes 17. Brackets 18 serve to support the heater unit in any convenient position in. the room.. Gas from the main 13 passes through a suitable reducing valve 19, and thence through the gas cock B which is part of the present invention.

This gas cook and switch is shown in detail in Figs. 2 to 4 inclusive, and comprises a cast body 20' in which is rotatably mounted a tapered vents the passage of gas when turned in the position shown in Fig. 3. and permits the free pas= sage of gas the'rethrough when turned at right angles to the position of Fig. 3 to the dotted line position of Fig. 2.

Theplug 21 carries a finger 26 which is rotatable'therewith to engage a forked lever 27 on a toggle switch 28 of a well known type. This switch. which need not be described in lie-=- tail as it forms no partof, the present invention, comprises a. metal roller 29 which is adapted to be rolled back and forth on an arcuate track 80 as the lever 2''! is moved from the full line position to the dotted line position, or vice verse, of Fig. 4.)" This roller when in the full line position of Fig. 4 engages a switch contact 31 on the near side of Fig. 4, and a similar .contact member 32' on the far side as shown insnap" switch which is operated'by means of I a pull chain 38. I

Referring now tothe wiring diagram of Fig. 5. the motor 15 which may be of any suitable type is connected at one side through a.lead 39 toalinemwhichisconnectedtoasuitablesource of electric current. The opposite side of the motor connects through a lead 41 with the switch 28, and-this is connected in series with the switch 37, and thm in turnconnects through .a lead 42 with the opposite side of the line 40. with both the switches 28 .and 3'! closed. the motor will be driven by current from the line and in turn wiildrive the fan 16. The switch 5 28, however, will be closed only when the plug cock is closed, as previously described.

In normal operation of the heating device the plug cock will be open, at which time the switch 28 will be in the dotted line position of Fig. 4,

l0 and will be open as shown in Fig. 5. At such'a time it will be immaterial whether the switch 3'1 is open or closed, as it will be rendered inoperative due to the fact that the switch 28 is open. At such a time the motor is supplied by 'electric current from'the lead 39 as before and through a lead 43, through a cutout switch 44 which is normally maintained closed by heat from the gas pilot of the heater unit, thence through a lead 45, through a manually operable switch 46, thence through a room thermostatic switch 47, and back through a lead 48 to the line 40.

Thus with the switch 46 normally closed and with the cutout switch ,44 held closed by heat from the gas pilot, the room thermostatic'switch 47 opens and closes, and as it does so it stops and starts the motor 15. This motor in turn controls through a governor, not shown, a gas valve 49 (Fig. 1) so thatzthis gas valve opens 'when the motor is in operation, thereby supplying gas to the heater at the same time the fan isoperated, and shutting off gas to the heater unit when the fan is stopped. This also forms no part of the present invention, and

accordingly is not illustrated.

Thus it will be seen that with the gas heater unit A in operation in" the usual way the gas cook 25 is turned to the full open position, dur-- ing which time the switch 28 is open. When,

however, it is desired to operate the fan 16 without using the heater unit the plugcock 25 is turned to the full line position of Fig. 2, at which time thegas is shut oil from the heater by the gas cock, ahd at the same time the switch 28 is closed; At that time'the fanis then controlled entirely by means of the switch 37.

While I have shown and described but a few embodiments of my invention, it is capable of many modifications. Changes, therefore, may

be made which do not depart from thespirit.

and scope of the invention as disclosed in the appended claim.

I claim:

The combination with a heating unit includ- .ing a fan, a heater for heating air delivered by the fan, said heater including a fluid fuel burner, and means including'a first electric circuitscontrolling said fan and burner, in response to room 'control of the fan and burner by, the first'circuit and when said valve is closed to enable complete control of said fan by said manually operable switch when said flrstcircuit is deenergized. 

